From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
To: okaya@kernel.org
Cc: dev@dpdk.org
Subject: Re: [PATCH v2 06/11] malloc: check result of rte_mem_virt2memseg_list
Date: Tue, 22 Nov 2022 18:52:30 +0300 [thread overview]
Message-ID: <20221122185230.19424bd9@sovereign> (raw)
In-Reply-To: <20221121223208.1147154-7-okaya@kernel.org>
2022-11-21 17:32 (UTC-0500), okaya@kernel.org:
> From: Sinan Kaya <okaya@kernel.org>
>
> In alloc_pages_on_heap result of call to rte_mem_virt2memseg_list
> is dereferenced here and may be null.
>
> Signed-off-by: Sinan Kaya <okaya@kernel.org>
> ---
> lib/eal/common/malloc_heap.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/lib/eal/common/malloc_heap.c b/lib/eal/common/malloc_heap.c
> index 503e551bf9..3f41430e42 100644
> --- a/lib/eal/common/malloc_heap.c
> +++ b/lib/eal/common/malloc_heap.c
> @@ -323,6 +323,8 @@ alloc_pages_on_heap(struct malloc_heap *heap, uint64_t pg_sz, size_t elt_size,
>
> map_addr = ms[0]->addr;
> msl = rte_mem_virt2memseg_list(map_addr);
> + if (msl == NULL)
> + return NULL;
It is not really possible, because the memory lock is held,
so "map_addr" cannot be unmapped/remapped concurrently,
and "ms" belongs to some MSL by definition of memseg.
RTE_ASSERT() can be added for clarity.
next prev parent reply other threads:[~2022-11-22 15:52 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-21 22:31 [PATCH v2 00/11] codeql fixes for various subsystems okaya
2022-11-21 22:32 ` [PATCH v2 01/11] ethdev: check return result of rte_eth_dev_info_get okaya
2022-11-21 22:32 ` [PATCH v2 02/11] net/tap: check if name is null okaya
2022-11-21 22:32 ` [PATCH v2 03/11] memzone: check result of rte_fbarray_get okaya
2022-11-21 22:32 ` [PATCH v2 04/11] memzone: check result of malloc_elem_from_data okaya
2022-11-22 15:52 ` Dmitry Kozlyuk
2022-11-21 22:32 ` [PATCH v2 05/11] malloc: malloc_elem_join_adjacent_free can return null okaya
2022-11-22 15:52 ` Dmitry Kozlyuk
2022-11-21 22:32 ` [PATCH v2 06/11] malloc: check result of rte_mem_virt2memseg_list okaya
2022-11-22 15:52 ` Dmitry Kozlyuk [this message]
2022-11-21 22:32 ` [PATCH v2 07/11] malloc: check result of rte_fbarray_get okaya
2022-11-22 15:52 ` Dmitry Kozlyuk
2022-11-21 22:32 ` [PATCH v2 08/11] malloc: check result of rte_mem_virt2memseg okaya
2022-11-22 15:52 ` Dmitry Kozlyuk
2022-11-21 22:32 ` [PATCH v2 09/11] malloc: check result of malloc_elem_free okaya
2022-11-22 15:52 ` Dmitry Kozlyuk
2022-11-22 15:24 ` [PATCH v2 00/11] codeql fixes for various subsystems David Marchand
2022-11-22 15:26 ` Sinan Kaya
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